Seiko Cal. 6631 - 589

Released in 1976, the Cal. 6631 with design code 589 was part of Seiko's domestic market collection. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-e026dd867ef2]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1976

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